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参数资料
| 型号： | FAN5903UCX |
| 厂商： | Fairchild Semiconductor |
| 文件页数： | 3/19页 |
| 文件大小： | 0K |
| 描述： | IC CONV BUCK W/BYPASS 9-WLCSP |
| 标准包装： | 3,000 |
| 应用： | 转换器，3G RF 功率放大器 |
| 输入电压： | 2.7 V ~ 5.5 V |
| 输出数： | 1 |
| 输出电压： | 0.4 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 9-UFBGA，WLCSP |
| 供应商设备封装： | * |
| 包装： | 带卷 (TR) |
Pin Configuration
VCON
A1
EN
B1
BPEN
C1
0.4
AGND
A2
FSEL
B2
FB
C2
1.34 mm
PGND
A3
SW
B3
PVIN
C3
PGND
A3
SW
B3
PVIN
C3
AGND
A2
FSEL
B2
FB
C2
1.34 mm
0.4
VCON
A1
EN
B1
BPEN
C1
Figure 3. Top-Through View, Bumps Face Down
Pin Definitions
Figure 4. Top-Through View, Bumps Face Up
Pin #
A1
A2
A3
B1
B2
B3
C1
C2
C3
Name
VCON
AGND
PGND
EN
FSEL
SW
BPEN
FB
PVIN
Description
Analog control pin. Shield signal routing against noise.
Analog ground, reference ground for the IC. Follow PCB routing notes for connecting this pin.
Power ground of the internal MOSFET switches. Follow routing notes for connections between
PGND and AGND.
Enables switching when HIGH, Shutdown Mode when LOW. This pin should not be left floating.
Switching frequency select. When FSEL is LOW, the DC-DC operates at 6 MHz. When FSEL is
HIGH, the DC-DC operates at 3 MHz. This pin should not be left floating.
Switching node of the internal MOSFET switches. Connect to output inductor.
Force bypass transistor when HIGH; auto-bypass when LOW. This pin should not be left floating.
Output voltage-sense pin. Connect to VOUT to establish feedback path for regulation point.
Supply voltage input to the internal MOSFET switches; connect to input power source.
? 2008 Fairchild Semiconductor Corporation
FAN5903 ? Rev. 1.0.9
3
www.fairchildsemi.com
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